DIY Tips

The 2 Story Rear Extension

The 2 Story Rear Extension

The time has finally come to stop procrastinating with the little jobs and get on with building myself a new bedroom

This Project is Still Ongoing (and will be for some time!)

I’ve spent a lot of time planning and designing this extension, researching everything from cranked vents to ridge boards.

What Do I Need to do?

A fair bit!

The DIY tasks ahead of me are huge but I’ve designed everything so that nothing is beyond my means and if I do come across something I’m not sure about, I’ll just wing it. Rather than list all the individual DIY tasks, which will be a bit boring, here’s a run down on the extension, let’s start with some layouts that I used for planning:

The Rear Elevation looks at the extension face on, as it projects out from my existing house. You can see the balcony with two side walls

 

 

The first floor is a large bedroom (the bed is a super king, so makes the room look small) with a generous sized en suite and a walk in wardrobe (10% mine, 90% for the missus)

 

Estimates

Just for a bit of fun, I have a go at estimating the cost & time

Well this is tricky. A total stab in the dark here and I reckon I could build the lot for £35,000.

On the timings, another total stab in the dark and let’s go for 14 months, by mid Summer 2020.

Daily log

A brief log of my battles with the tasks! with a few pictures chucked in…

January/ February 2017 (before this website)

The first thing to do with any new project is to get surveying, and for a 2 story rear extension, this is quite a bit of measuring!

Once measured up , I drew my existing plans and elevations:

Rear Elevation of the back of my house, as it was before any work started. It’s necessary to include drawings of the existing house as part of the planning application

Complete ground floor plan extending to the adopted road at the front of my house and half way up my rear garden. I was including a shed as part of my planning application and this was located right at the front. Normally, going that far in front isn’t necessary for a rear extension

Existing first floor layout and combined roof plan

The survey drawings are pretty simple. It took me 2 months to survey the house and draw it all up, that was in my spare time.

March/April 2017

It took me a further two months to draw up the set of plans for the planning submission. This took quite a bit of thought as we new we wanted a balcony but realised that would be tricky to get through planning. Mainly due to the invasion on our neighbours privacy.

You can see I also included the proposed new front porch as part of the same application

Once all the plans, existing and proposed, were made, I filled out the form and popped it all in the post to the council and commenced biting my nails! Was a nervous time as we’d bought the house with the sole intention of having a new master bedroom, en suite and especially a balcony!

November 2018-January 2019

So a bit of a gap there! I got the planning approved after a few compromises (many thanks to my neighbours!!!!) and over Christmas 2018 I got on with the detailed design. I’d already shipped the approved planning drawings to an Engineer for some structural input, and he’d come back with the structural items to include in the build. These were things like beam and columns specifications, some details, foundation design and lots of other specs for me to adhere to.

The new drawing included loads of close up details and sections, so I knew exactly what I was going to build and how to build it.

Week beginning 11th February 2019

Finally starting on the extension this week and I realised I have to remove about 50 cubic metres of soil by hand, into skips! This lot weighs approximately 60 tonnes! That’s about 8 large skips. Still, I’m doing the London marathon in April 2019 and this is just really good training.

I had two skips delivered at the same time because I knew I could fill them up quicker than they could take them away.



End of day 3 – At this point the mechanical wheelbarrow had broken down for the 2nd time that day, so it was back to the manual barrow!

And once it had got too late to dig, I did some setting out

26th February 2019

Today was the day for pouring the foundations, but first the excavations had to be inspected by the local building inspector. After a 2 minute “inspection”, and a comment questioning the depth of the foundations (the one’s next to the 10m high tree), I was pleased to hear all was well, and I could proceed with the concrete pour.

I calculated I’d need around 18 cubic metres of the stuff, that’s about 43 tonnes. I had the help of two others, so we started off the day by placing planks over the trenches in readiness for the barrowing.

I also had to secure the Claymaster heave protection foam sheets to the sides of some trenches (they’re the white sheets in the picture above). For some reason, I opted for us three to barrow the concrete from the front. To this day, I don’t know why I didn’t just get a pump, it would’ve been so much easier! Needless to say, it was hard work, so I stopped at 12 cubic metres (two mixer lorry’s), leaving the top of the concrete lower than planned. At the time, I figured I’d just use more blocks to build the walls up from the lower foundations, not realising that it wasn’t quite this simple, as I’ll explain later.

2nd March 2019

Now it was time to start putting the blocks in place. Before this, I had to set-out the outline of the building and its corners, so I knew where to lay the first blocks.

Setting out using a stringline to make sure the extension lines in with the existing house

Once I’d set everything out, I began laying the blocks. By the end of that day I’d got a few in, then it started to rain!

And it rained, and rained, for months. The trenches became submersed in water and the only way to remove it was to pump it out.


Previous
DIY Decking | Part 1 – Planning & Design
Next
How to Build a Garden Deck